completion/sqlmap: simplify code flow (whitespace)

Convert from indented if-block to return then unindented code. This should have basically one line change at the top, one line removed at the bottom, and then all whitespace.

Apply `shfmt`, but `shellcheck` is an absolute mess, so don't add to `clean_files.txt` yet.

completion/available/sqlmap.completion.bash

@@ -7,11 +7,9 @@
 #                                                                            |
 # ---------------------------------------------------------------------------+
 
-if _command_exists sqlmap
-then
+_command_exists sqlmap || return
 
-    function _sqlmap()
-    {
+function _sqlmap() {
 	local cur prev
 
 	COMPREPLY=()
@@ -143,10 +141,10 @@ then
 			--dependencies --disable-coloring --identify-waf \
 			--mobile --page-rank --purge-output --smart \
 			--sqlmap-shell --wizard '
-        COMPREPLY=( $( \
-		(while read -d ' ' i; do
-                [[ -z "$i" || "${onlyonce/ ${i%% *} / }" == "$onlyonce" ]] &&
-                continue
+		COMPREPLY=($(
+			(
+				while read -d ' ' i; do
+					[[ -z "$i" || "${onlyonce/ ${i%% *} / }" == "$onlyonce" ]] && continue
 					# flatten array with spaces on either side,
 					# otherwise we cannot grep on word boundaries of
 					# first and last word
@@ -154,7 +152,8 @@ then
 					# remove word from list of completions
 					COMPREPLY=(${COMPREPLY/ ${i%% *} / })
 				done
-                printf '%s ' "${COMPREPLY[@]}") <<<"${COMP_WORDS[@]}"
+				printf '%s ' "${COMPREPLY[@]}"
+			) <<< "${COMP_WORDS[@]}"
 		))
 
 		#else
@@ -162,7 +161,4 @@ then
 	fi
 }
 
-
 complete -F _sqlmap sqlmap
-
-fi