Add XCompose language and highlighter (#3402)

* Add XCompose language and highlighter

* XCompose fix some errors in the Travis build

* Remove xmodmap files for XCompose

Most xmodmap files aren't XCompose, and there's not enough xmodmap files
which are XCompose to be worth adding to heuristics

* Remove some extensions/filenames from XCompose

* Rename and move sample to correct folder and filename

That we have added in languages.yml

* Use generated language id

.gitmodules

@@ -809,3 +809,6 @@
 [submodule "vendor/grammars/reason"]
 	path = vendor/grammars/reason
 	url = https://github.com/facebook/reason
+[submodule "vendor/grammars/language-xcompose"]
+	path = vendor/grammars/language-xcompose
+	url = https://github.com/samcv/language-xcompose

grammars.yml

@@ -439,6 +439,8 @@ vendor/grammars/language-wavefront:
 - source.wavefront.obj
 vendor/grammars/language-xbase:
 - source.harbour
+vendor/grammars/language-xcompose:
+- config.xcompose
 vendor/grammars/language-yaml:
 - source.yaml
 vendor/grammars/language-yang:

lib/linguist/languages.yml

@@ -4584,6 +4584,15 @@ XC:
   codemirror_mode: clike
   codemirror_mime_type: text/x-csrc
   language_id: 398
+XCompose:
+  type: data
+  filenames:
+  - ".XCompose"
+  - "XCompose"
+  - "xcompose"
+  tm_scope: 'config.xcompose'
+  ace_mode: text
+  language_id: 225167241
 XML:
   type: data
   ace_mode: xml

vendor/README.md

@@ -361,6 +361,7 @@ This is a list of grammars that Linguist selects to provide syntax highlighting
 - **X10:** [x10-lang/x10-highlighting](https://github.com/x10-lang/x10-highlighting)
 - **xBase:** [hernad/atom-language-harbour](https://github.com/hernad/atom-language-harbour)
 - **XC:** [graymalkin/xc.tmbundle](https://github.com/graymalkin/xc.tmbundle)
+- **XCompose:** [samcv/language-xcompose](https://github.com/samcv/language-xcompose)
 - **XML:** [textmate/xml.tmbundle](https://github.com/textmate/xml.tmbundle)
 - **Xojo:** [angryant0007/VBDotNetSyntax](https://github.com/angryant0007/VBDotNetSyntax)
 - **XProc:** [textmate/xml.tmbundle](https://github.com/textmate/xml.tmbundle)

vendor/licenses/grammar/language-xcompose.txt

@@ -0,0 +1,27 @@
+---
+type: grammar
+name: language-xcompose
+license: mit
+---
+The MIT License (MIT)
+
+Copyright (c) 2016 Samantha McVey
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+