Add parentheses to denote debug from function

src/include/pretty.sh

@@ -214,7 +214,7 @@ _pretty__get_caller() {
         _pretty__is_internal && continue
         _pretty__is_frontend && continue
         test "$fname" = "usage" && continue
-        echos "$fname"
+        echos "$fname()"
         return
     done
 }
@@ -278,9 +278,9 @@ _pretty__echo() {
     local provider  # which provider (_pretty__echo_*()) to use
     frontend="$(_pretty__get_frontend)" || exit_usage
     caller="$(_pretty__get_caller)"
-    test "$caller"   == "main"       && caller="$(basename "$0")"
-    test "$caller"   == "usage"      && frontend=mkusage
-    test "$frontend" == "debug_pipe" && frontend=debug
+    test "$caller"   == "main()"        && caller="$(basename "$0")"
+    test "$caller"   == "usage()"       && frontend=mkusage
+    test "$frontend" == "debug_pipe()"  && frontend=debug
     while true; do case $1 in
         -c|--cmd)   provider=cmd;   shift; break ;;
         -f|--files) provider=files; shift; break ;;

tests/pretty_basic/oracle/v0_d1/debug.stderr

@@ -1 +1 @@
-debug:tf_testflt: foo
+debug:tf_testflt(): foo

tests/pretty_basic/oracle/v0_d1/debug_pipe.stderr

@@ -1,2 +1,2 @@
-debug:tf_testflt: |foo: 'line 1'
-debug:tf_testflt: |foo: 'line 2'
+debug:tf_testflt(): |foo: 'line 1'
+debug:tf_testflt(): |foo: 'line 2'

tests/pretty_basic/oracle/v1_d1/debug.stderr

@@ -1 +1 @@
-debug:tf_testflt: foo
+debug:tf_testflt(): foo

tests/pretty_basic/oracle/v1_d1/debug_pipe.stderr

@@ -1,2 +1,2 @@
-debug:tf_testflt: |foo: 'line 1'
-debug:tf_testflt: |foo: 'line 2'
+debug:tf_testflt(): |foo: 'line 1'
+debug:tf_testflt(): |foo: 'line 2'