feat(LEXER): support function names containing the at sign

Author: niall-byrne

.tool-versions

@@ -0,0 +1 @@
+ruby 3.2.2

lib/bashcov/lexer.rb

@@ -104,7 +104,7 @@ def relevant?(line)
                       line.start_with?(*IGNORE_START_WITH) ||
                       line.end_with?(*IGNORE_END_WITH)
 
-      return false if line =~ /\A[a-zA-Z_][a-zA-Z0-9_\-:\.]*\(\)/ # function declared without the `function` keyword
+      return false if line =~ /\A[a-zA-Z_@][a-zA-Z0-9_@\-:\.]*\(\)/ # function declared without the `function` keyword
       return false if line =~ /\A[^)]+\)\Z/ # case statement selector, e.g. `--help)`
 
       true

spec/test_app/scripts/function.sh

@@ -18,7 +18,7 @@ put-team-key() {
   echo put-team-key # 0
 }
 
-abc::def.fn() {
+abc::def.@fn() {
     echo "${FUNCNAME[0]}" # 1
 }