Split Fortran into fixed and free source by file extension (#4753)

* Split Fortran into fixed and free source by file extension

This permits applying a different tm_scope for modern Fortran.

* Rename Fortran languages and update ID for new Fortran sub-lang

* Fix extension order

* Add Fortran Free Form to grammars list

Co-authored-by: Colin Seymour <lildood@gmail.com>

Author: ararslan

lib/linguist/languages.yml

@@ -1533,22 +1533,32 @@ Forth:
   codemirror_mime_type: text/x-forth
   language_id: 114
 Fortran:
+  group: Fortran
   type: programming
   color: "#4d41b1"
   extensions:
-  - ".f90"
   - ".f"
-  - ".f03"
-  - ".f08"
   - ".f77"
-  - ".f95"
   - ".for"
   - ".fpp"
   tm_scope: source.fortran
   ace_mode: text
   codemirror_mode: fortran
   codemirror_mime_type: text/x-fortran
   language_id: 107
+Fortran Free Form:
+  group: Fortran
+  type: programming
+  extensions:
+  - ".f90"
+  - ".f03"
+  - ".f08"
+  - ".f95"
+  tm_scope: source.fortran.modern
+  ace_mode: text
+  codemirror_mode: fortran
+  codemirror_mime_type: text/x-fortran
+  language_id: 761352333
 FreeMarker:
   type: programming
   color: "#0050b2"

vendor/README.md

@@ -127,6 +127,7 @@ This is a list of grammars that Linguist selects to provide syntax highlighting
 - **Faust:** [jpcima/language-faust](https://github.com/jpcima/language-faust)
 - **Forth:** [textmate/forth.tmbundle](https://github.com/textmate/forth.tmbundle)
 - **Fortran:** [textmate/fortran.tmbundle](https://github.com/textmate/fortran.tmbundle)
+- **Fortran Free Form:** [textmate/fortran.tmbundle](https://github.com/textmate/fortran.tmbundle)
 - **FreeMarker:** [freemarker/FreeMarker.tmbundle](https://github.com/freemarker/FreeMarker.tmbundle)
 - **Frege:** [atom-haskell/language-haskell](https://github.com/atom-haskell/language-haskell)
 - **G-code:** [appliedengdesign/vscode-gcode-syntax](https://github.com/appliedengdesign/vscode-gcode-syntax)