Replace "master" word with less evocative synonyms

The few occurances in a specification of older formats, e.g.
modulemd-packager-v2 are left intact because those are constants of
the respective formats. There were not updated in commit
dc09c4b on purpose to preserve
compatibility.

Author: ppisar

modulemd/include/modulemd-2.0/modulemd-module-index.h

@@ -87,7 +87,8 @@ G_DECLARE_FINAL_TYPE (
  * The number of written bytes should be set to the @size_read variable.
  *
  * This handler is identical to a
- * [yaml_read_handler_t](https://github.com/yaml/libyaml/blob/master/include/yaml.h#L988)
+ * [yaml_read_handler_t in yaml.h header of
+ * libyaml](https://github.com/yaml/libyaml/blob/2c891fc7a770e8ba2fec34fc6b545c672beb37e6/include/yaml.h#L988)
  * but is included here to avoid depending on yaml.h in modulemd headers.
  *
  * Returns: On success, the handler must return 1. If the handler failed,
@@ -115,7 +116,8 @@ typedef gint (*ModulemdReadHandler) (void *data,
  * @buffer to the output.
  *
  * This handler is identical to a
- * [yaml_write_handler_t](https://github.com/yaml/libyaml/blob/master/include/yaml.h#L1478)
+ * [yaml_write_handler_t in yaml.h header of
+ * libyaml](https://github.com/yaml/libyaml/blob/2c891fc7a770e8ba2fec34fc6b545c672beb37e6/include/yaml.h#L1478)
  * but is included here to avoid depending on yaml.h in modulemd headers.
  *
  * Returns: On success, the handler must return 1. If the handler failed,

modulemd/tests/test-modulemd-moduleindex.c

@@ -1089,7 +1089,7 @@ module_index_test_custom_read (void)
 "version: 2\n"
 "data:\n"
 "  name: testmodule\n"
-"  stream: master\n"
+"  stream: main\n"
 "  version: 20180405123256\n"
 "  context: c2c572ec\n"
 "  arch: x86_64\n"
@@ -1147,7 +1147,7 @@ module_index_test_custom_read (void)
 "        rationale: A dependency of tangerine.\n"
 "        repository: git://pkgs.fedoraproject.org/rpms/perl-List-Compare\n"
 "        cache: http://pkgs.fedoraproject.org/repo/pkgs/perl-List-Compare\n"
-"        ref: master\n"
+"        ref: main\n"
 "      perl-Tangerine:\n"
 "        rationale: Provides API for this module and is a dependency of tangerine.\n"
 "        repository: git://pkgs.fedoraproject.org/rpms/perl-Tangerine\n"
@@ -1157,7 +1157,7 @@ module_index_test_custom_read (void)
 "        rationale: Provides API for this module.\n"
 "        repository: git://pkgs.fedoraproject.org/rpms/tangerine\n"
 "        cache: http://pkgs.fedoraproject.org/repo/pkgs/tangerine\n"
-"        ref: master\n"
+"        ref: main\n"
 "        buildorder: 10\n"
 "  artifacts:\n"
 "    rpms:\n"
@@ -1205,7 +1205,7 @@ module_index_test_custom_write (void)
 "version: 2\n"
 "data:\n"
 "  name: testmodule\n"
-"  stream: master\n"
+"  stream: main\n"
 "  version: 20180405123256\n"
 "  context: c2c572ec\n"
 "  arch: x86_64\n"
@@ -1263,7 +1263,7 @@ module_index_test_custom_write (void)
 "        rationale: A dependency of tangerine.\n"
 "        repository: git://pkgs.fedoraproject.org/rpms/perl-List-Compare\n"
 "        cache: http://pkgs.fedoraproject.org/repo/pkgs/perl-List-Compare\n"
-"        ref: master\n"
+"        ref: main\n"
 "      perl-Tangerine:\n"
 "        rationale: Provides API for this module and is a dependency of tangerine.\n"
 "        repository: git://pkgs.fedoraproject.org/rpms/perl-Tangerine\n"
@@ -1273,7 +1273,7 @@ module_index_test_custom_write (void)
 "        rationale: Provides API for this module.\n"
 "        repository: git://pkgs.fedoraproject.org/rpms/tangerine\n"
 "        cache: http://pkgs.fedoraproject.org/repo/pkgs/tangerine\n"
-"        ref: master\n"
+"        ref: main\n"
 "        buildorder: 10\n"
 "  artifacts:\n"
 "    rpms:\n"

modulemd/tests/test_data/290.yaml

@@ -2,7 +2,7 @@ document: modulemd
 version: 1
 data:
   name: testmodule
-  stream: master
+  stream: main
   version: 20180205135154
   context: 9c690d0e
   summary: A test module in all its beautiful beauty
@@ -57,16 +57,16 @@ data:
       perl-List-Compare:
         rationale: A dependency of tangerine.
         repository: https://src.fedoraproject.org/rpms/perl-List-Compare
-        ref: master
+        ref: main
         cache: http://pkgs.fedoraproject.org/repo/pkgs/perl-List-Compare
       tangerine:
         rationale: Provides API for this module.
         buildorder: 10
         repository: https://src.fedoraproject.org/rpms/tangerine
-        ref: master
+        ref: main
         cache: http://pkgs.fedoraproject.org/repo/pkgs/tangerine
       perl-Tangerine:
         rationale: Provides API for this module and is a dependency of tangerine.
         repository: https://src.fedoraproject.org/rpms/perl-Tangerine
-        ref: master
+        ref: main
         cache: http://pkgs.fedoraproject.org/repo/pkgs/perl-Tangerine

modulemd/tests/test_data/buildafter/both_same_component_v2.yaml

@@ -45,10 +45,10 @@ data:
         ref: 1
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10

modulemd/tests/test_data/buildafter/good_buildafter_v2.yaml

@@ -45,10 +45,10 @@ data:
         ref: 1
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10

modulemd/tests/test_data/buildafter/invalid_key_v2.yaml

@@ -45,10 +45,10 @@ data:
         ref: 1
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10

modulemd/tests/test_data/buildafter/mixed_buildorder_v2.yaml

@@ -46,11 +46,11 @@ data:
         buildorder: 10
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
         buildorder: 10
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
         buildorder: 10
       nodejs:
         rationale: Javascript runtime and npm package manager.

modulemd/tests/test_data/buildarches/bad_combo_arches_v2.yaml

@@ -47,11 +47,11 @@ data:
         ref: 1
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
         arches: [i686, x86_64]
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10

modulemd/tests/test_data/buildarches/good_combo_arches_v2.yaml

@@ -47,11 +47,11 @@ data:
         ref: 1
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
         arches: [ppc64le, x86_64]
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10

modulemd/tests/test_data/buildarches/good_no_arches_v2.yaml

@@ -45,10 +45,10 @@ data:
         ref: 1
       http-parser:
         rationale: Needed for parsing HTTP requests
-        ref: master
+        ref: main
       nghttp2:
         rationale: Needed for HTTP2 support
-        ref: master
+        ref: main
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10