Update rspec completion

* Fix -I
* Setting exclusive options
* Configuring options that can be used multiple times
* Add descriptions for each formatters

src/_rspec

@@ -43,7 +43,7 @@ _rspec() {
   local context state line curcontext="$curcontext"
 
   _arguments -C \
-    *'-I[Specify PATH to add to $LOAD_PATH (may be used more than once)]:PATH:_files -/' \
+    '*-I[Specify PATH to add to $LOAD_PATH (may be used more than once)]:PATH:_files -/' \
     '*'{-r,--require}'[Require a file]:PATH:_files' \
     '*'{-O,--options}'[Specify the path to a custom options file]:PATH:_files' \
     '--order[Run examples by the specified order type]: :->order' \
@@ -51,27 +51,28 @@ _rspec() {
     '--bisect[Repeatedly runs the suite in order to isolate the failures to the smallest reproducible case]' \
     '--only-failures[Filter to just the examples that failed the last time they ran]' \
     '(-n --next-failure)'{-n,--next-failure}'[Apply `--only-failures` and abort after one failure (equivalent to `--only-failures --fail-fast --order defined`)]' \
-    '--fail-fast[Abort the run on first failure]' \
+    '(--no-fail-fast)--fail-fast[Abort the run on first failure]' \
-    '--no-fail-fast[Do not abort the run on first failure]' \
+    '(--fail-fast)--no-fail-fast[Do not abort the run on first failure]' \
     '--failure-exit-code[Override the exit code used when there are failing specs]: :_guard "[[\:digit\:]]#" "CODE"' \
     '--error-exit-code[Override the exit code used when there are errors loading or running specs]:code' \
     '--dry-run[Print the formatter output of your suite without running any examples or hooks]' \
     '(-X --drb)'{-X,--drb}'[Run examples via DRb]' \
+    '(-X --drb)--no-drb[Do not run examples via DRb]' \
     '--drb-port[Port to connect to the DRb server]: :_guard "[[\:digit\:]]#" "PORT"' \
-    '(-f --format)'{-f,--format}'[Choose a formatter]:FORMATTER:(progress documentation html json failures)' \
+    '(-f --format)'{-f,--format}'[Choose a formatter]: :->format' \
     '(-o --out)'{-o,--out}'[Write output to a file instead of $stdout]:FILE:_files' \
     '--deprecation-out[Write deprecation warnings to a file instead of $stderr]:FILE:_files' \
     '(-b --backtrace)'{-b,--backtrace}'[Enable full backtrace]' \
-    '--force-color[Force the output to be in color, even if the output is not a TTY]' \
+    '(--no-color)--force-color[Force the output to be in color, even if the output is not a TTY]' \
-    '--no-color[Force the output to not be in color, even if the output is a TTY]' \
+    '(--force-color)--no-color[Force the output to not be in color, even if the output is a TTY]' \
-    '(-p --profile)'{-p,--profile}'[Enable profiling of examples and list the slowest examples (default: 10)]: :_guard "[[\:digit\:]]#" "COUNT"' \
+    '(-p --profile --no-profile)'{-p,--profile}'[Enable profiling of examples and list the slowest examples (default: 10)]: :_guard "[[\:digit\:]]#" "COUNT"' \
-    '--no-profile[Disable profiling of examples]' \
+    '(-p --profile)--no-profile[Disable profiling of examples]' \
     '(-w --warnings)'{-w,--warnings}'[Enable ruby warnings]' \
     '(-P --pattern)'{-P,--pattern}'[Load files matching pattern (default: "spec/**/*_spec.rb")]:PATTERN:' \
     '--exclude-pattern[Load files except those matching pattern]:PATTERN:' \
-    '(-e --example)'{-e,--example}'[Run examples whose full nested names include STRING (may be used more than once)]:STRING:' \
+    '*'{-e,--example}'[Run examples whose full nested names include STRING (may be used more than once)]:STRING:' \
-    '(-E --example-matches)'{-E,--example-matches}'[Run examples whose full nested names match REGEX]:regex' \
+    '*'{-E,--example-matches}'[Run examples whose full nested names match REGEX]:regex' \
-    '(-t --tag)'{-t,--tag}'[Run examples with the specified tag, or exclude examples by adding ~ before the tag]: :->tag' \
+    '*'{-t,--tag}'[Run examples with the specified tag, or exclude examples by adding ~ before the tag]: :->tag' \
     '--default-path[Set the default path where RSpec looks for examples (can be a path to a file or a directory)]:PATH:_files' \
     '(- *)--init[Initialize your project with RSpec]' \
     '(- *)'{-h,--help}"[You're looking at it]" \
@@ -97,6 +98,14 @@ _rspec() {
         _message 'TAG[:VALUE]'
       fi
       ;;
+    format)
+      _values 'FORMATTER' \
+        'progress[dots (default)]' \
+        'documentation[group and example names]' \
+        'html[HTML]' \
+        'json[JSON]' \
+        'failures["file:line:reason", suitable for editors integration]'
+      ;;
   esac
 }