scripts/decode_stacktrace.sh: symbol: avoid trailing whitespaces

commit d322f6a24ee5964a58294f61bf96a1b6404c676d upstream.

A few patches slightly improving the output generated by
decode_stacktrace.sh.


This patch (of 3):

Lines having a symbol to decode might not always have info after this
symbol.  It means ${info_str} might not be set, but it will always be
printed after a space, causing trailing whitespaces.

That's a detail, but when the output is opened with an editor marking
these trailing whitespaces, that's a bit disturbing.  It is easy to remove
them by printing this variable with a space only if it is set.

While at it, do the same with ${module} and print everything in one line.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
Reviewed-by: Carlos Llamas <[email protected]>
Reviewed-by: Breno Leitao <[email protected]>
Reviewed-by: Luca Ceresoli <[email protected]>
Cc: Carlos Llamas <[email protected]>
Cc: Elliot Berman <[email protected]>
Cc: Stephen Boyd <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: matttbe

scripts/decode_stacktrace.sh

@@ -323,12 +323,7 @@ handle_line() {
 	parse_symbol # modifies $symbol
 
 	# Add up the line number to the symbol
-	if [[ -z ${module} ]]
-	then
-		echo "${words[@]}" "$symbol ${info_str}"
-	else
-		echo "${words[@]}" "$symbol $module ${info_str}"
-	fi
+	echo "${words[@]}" "${symbol}${module:+ ${module}}${info_str:+ ${info_str}}"
 }
 
 while read line; do