Fix clang-format script (#90)

* clang-format: handle -- argument in script

* clang-format: change syntax highlighting language

bash => sh

* clang-format: clarify help

file => config file

programs/clang-format.json

@@ -3,7 +3,7 @@
         {
             "path": "$HOME/.clang-format",
             "movable": false,
-            "help": "Providing exact path to file via _--style_ (_-style_) flag is supported since version 14, but some repositories (Arch Linux repositories, for example) still don't have that version.\n\nWith version 14 or higher move file to _\"$XDG_CONFIG_HOME\"/clang-format_ and place this shell script with name \"clang-format\" to some directory in _\"$PATH\"_, preceding _/usr/bin/_ (I suggest _\"$HOME\"/.local/bin/_ or _/usr/local/bin/_):\n```bash\n#!/usr/bin/env sh\n\nCONFIG_FILE_PATH=\"$XDG_CONFIG_HOME\"/clang-format\n\nstyle_arg_set() {\n    for arg in \"$@\"\n    do\n        case \"$arg\" in\n            -style*|--style*)\n                return 0\n        esac\n    done\n    return 1\n}\n\nif style_arg_set \"$@\"\nthen\n    /usr/bin/clang-format \"$@\"\nelse\n    /usr/bin/clang-format --style=file:\"$CONFIG_FILE_PATH\" \"$@\"\nfi\n```\n\n_Note: .clang-format file is recognized by clang-format if it is located in any of the parent directories of the source file, not just \"$HOME\". This feature of the program may also be used._"
+            "help": "Providing path to config file via _--style_ (_-style_) flag is supported since version 14, but some repositories (Arch Linux repositories, for example) still don't have that version.\n\nWith version 14 or higher move config file to _\"$XDG_CONFIG_HOME\"/clang-format_ and place this shell script with name \"clang-format\" to some directory in _\"$PATH\"_, preceding _/usr/bin/_ (I suggest _\"$HOME\"/.local/bin/_ or _/usr/local/bin/_):\n```sh\n#!/usr/bin/env sh\n\nCONFIG_FILE_PATH=\"$XDG_CONFIG_HOME\"/clang-format\n\nstyle_arg_set() {\n    for arg in \"$@\"\n    do\n        case \"$arg\" in\n            -style*|--style*)\n                return 0\n                ;;\n            --)\n                return 1\n        esac\n    done\n    return 1\n}\n\nif style_arg_set \"$@\"\nthen\n    /usr/bin/clang-format \"$@\"\nelse\n    /usr/bin/clang-format --style=file:\"$CONFIG_FILE_PATH\" \"$@\"\nfi\n```\n\n_Note: .clang-format file is recognized by clang-format if it is located in any of the parent directories of the source file, not just \"$HOME\". This feature of the program may also be used._"
         }
     ],
     "name": "clang-format"