Don't use global variables

and fix indentations

src/_golang

@@ -45,8 +45,7 @@
 # ------------------------------------------------------------------------------
 
 __go_buildmodes() {
-  local -a buildmodes
+  local -a buildmodes=(
-  buildmodes=(
     'archive[non-main packages into .a files]'
     'c-archive[main package, plus all packages it imports, into a C archive file]'
     'c-shared[main package, plus all packages it imports, into a C shared library]'
@@ -60,10 +59,8 @@ __go_buildmodes() {
   _values 'mode' $buildmodes
 }
 
-
 __go_runtimedebug() {
-  local -a vars
+  local -a vars=(
-  vars=(
     'allocfreetrace[profile allocations]:boolean:(1 0)'
     'clobberfree[clobber memory after free]:boolean:(1 0)'
     'cgocheck[check passing go pointers to non-go]: :((0\:"no checks" 1\:"check checks" 2\:"expensive checks"))'
@@ -173,7 +170,7 @@ __go_gcflags() {
     '-trimpath=[remove prefix from recorded source file paths]:prefix' \
     '-v[increase debug verbosity]' \
     '-w[debug type checking]' \
-  '-wb[enable write barrier (default true)]' \
+    '-wb[enable write barrier (default true)]'
 }
 
 __go_pgo() {
@@ -182,8 +179,8 @@ __go_pgo() {
     "file:file:_files"
 }
 
-local -a commands build_flags
+local -a build_flags
-commands=(
+local -a commands=(
   'bug:start a bug report'
   'build:compile packages and dependencies'
   'clean:remove object files and cached files'
@@ -368,21 +365,20 @@ case $state in
       '-trimpath[remove all file system paths from the resulting executable]'
       '-toolexec[program to use to invoke toolchain programs]:args'
     )
-    mod_flags=(
+    local -a mod_flags=(
       '-mod=[module download mode to use]:download mode:(readonly vendor mod)'
       '-modcacherw[leave newly-created directories in the module cache read-write]'
       '-modfile=[read an alternate go.mod file]:modfile: _files -g "*.mod"'
     )
-
+    local -a edit_flags=(
-    edit_flags=(
+      '-fmt[reformats the go.mod/work file without making other changes]'
-    '-fmt[reformats the go.mod/work file without making other changes]' \
+      '*-require=[add a requirement on the given module path and version]:require'
-    '*-require=[add a requirement on the given module path and version]:require' \
+      '*-droprequire=[drop a requirement on the given module path and version]:droprequire'
-    '*-droprequire=[drop a requirement on the given module path and version]:droprequire' \
+      '-go[sets the expected Go language version]:goversion'
-    '-go[sets the expected Go language version]:goversion' \
+      '*-replace=[add a replacement of the given module path and version]:replace'
-    '*-replace=[add a replacement of the given module path and version]:replace' \
+      '*-dropreplace=[drop a replacement of the given module path and version]:dropreplace'
-    '*-dropreplace=[drop a replacement of the given module path and version]:dropreplace' \
+      '-json[prints the final go.mod/work file in JSON format]'
-    '-json[prints the final go.mod/work file in JSON format]' \
+      '-print[prints the final go.mod/work in its text format]'
-    '-print[prints the final go.mod/work in its text format]' \
     )
 
     __go_packages() {
@@ -438,8 +434,7 @@ case $state in
           ;;
 
       env)
-        local -a goenvvars
+        local -a goenvvars=(
-        goenvvars=(
           "GOARCH[architecture, or processor, for which to compile code.]:architecture"
           "GCCGO[gccgo command to run.]:gccgo command"
           "GOBIN[directory where 'go install' installs to]:go install target dir"
@@ -497,8 +492,7 @@ case $state in
           "GOMOD[absolute path the the main go.mod]:abs path to main go.mod"
           "GOTOOLDIR[installation directory of go tools]:tool installation directory"
         )
-        local -a exclude_from_w
+        local -a exclude_from_w=(GOENV)
-        exclude_from_w=(GOENV)
 
         __list_env_vars() {
           # the parameter expansion strops off everything after the first [
@@ -559,8 +553,7 @@ case $state in
         ;;
 
       list)
-        local -a list_args
+        local -a list_args=(
-        list_args=(
           '-e[changes the handling of erroneous packages]'
           '-f[specifies an alternate format for the list]:format'
           '-json[causes package data to be printed in JSON format]'
@@ -582,8 +575,7 @@ case $state in
         ;;
 
       mod)
-        local -a mod_commands
+        local -a mod_commands=(
-        mod_commands=(
           'download:download modules to local cache'
           'edit:edit go.mod from tools or scripts'
           'graph:print module requirement graph'
@@ -763,14 +755,13 @@ case $state in
                 ;;
 
               callgraph)
-                local -a algos graphs
+                local -a algos=(
-                algos=(
                   'static:static calls only'
                   'cha:Class Hierarchy Analysis'
                   'rta:Rapid Type Analysis'
                   'pta:inclusion-based Points-To Analysis'
                 )
-                graphs=(
+                local -a graphs=(
                   'digraph:output in digraph format'
                   'graphviz:output in AT&T GraphViz (.dot) format'
                 )
@@ -1052,7 +1043,6 @@ case $state in
           '*:files:_files'
         ;;
 
-
       vet)
         _arguments \
           '-n[print commands that would be executed]' \
@@ -1062,8 +1052,7 @@ case $state in
         ;;
 
       work)
-        local -a work_commands
+        local -a work_commands=(
-        work_commands=(
           'edit:edit go.work from tools or scripts'
           'init:initialize workspace file'
           'sync:sync workspace build list to modules'
@@ -1103,10 +1092,8 @@ case $state in
         esac
         ;;
 
-
       help)
-        local -a topics
+        local -a topics=(
-        topics=(
           'buildconstraint:build constraints'
           'buildmode:build modes'
           'c:calling between Go and C'