Fix: '?' and ';' must not be made into a string

moduletests/expected/phantomstring.bash

@@ -1,5 +1,6 @@
 echo "$a" "$b"
 echo "$a$b"
+echo "$a$(:)"
 echo "$a/blædi/ "
 echo "$a/blædi/$b"
 echo "$a/blædi/$(
@@ -43,8 +44,14 @@ echo "$a/blædi/$(
 	echo "${PWD}Z"
 	echo "${PWD}_"
 )"
-echo "$a$(";")"
-echo "$a";";"
-echo "$a"|";"
+# Characters that must not be swallowed
+echo "$a"' '
+echo "$a" ""
+echo "$a"*":"
+echo "$a"?":"
+echo "$a";":"
+echo "$a"&":"
+echo "$a"|":"
+echo "$a"\;":"
 echo "$a">"/dev/null"
 echo "$a"<"/dev/null"

moduletests/original/phantomstring.bash

@@ -1,5 +1,6 @@
 echo $a $b
 echo $a$b
+echo $a`:`
 echo $a/blædi/" "
 echo $a/blædi/$b
 echo $a/blædi/$(
@@ -43,8 +44,14 @@ echo $a/blædi/$(
 	echo $(pwd)"Z"
 	echo $(pwd)"_"
 )
-echo $a`";"`
-echo $a;";"
-echo $a|";"
+# Characters that must not be swallowed
+echo $a' '
+echo $a ""
+echo $a*":"
+echo $a?":"
+echo $a;":"
+echo $a&":"
+echo $a|":"
+echo $a\;":"
 echo $a>"/dev/null"
 echo $a<"/dev/null"

src/sitstrphantom.rs

@@ -16,6 +16,7 @@ use ::commonstrcmd::CommonStrCmdResult;
 use ::commonstrcmd::common_str_cmd;
 
 use ::microparsers::predlen;
+use ::microparsers::is_word;
 
 use ::sitstrdq::SitStrDq;
 
@@ -38,7 +39,7 @@ impl Situation for SitStrPhantom {
 						pre: mouthful, len: 1, alt: Some(b"")
 					});
 				}
-				b'$' | b'\\' | b'`' => {
+				b'$' | b'`' => {
 					match common_str_cmd(&horizon, mouthful, is_horizon_lengthenable, true) {
 						CommonStrCmdResult::None => {},
 						CommonStrCmdResult::Err(e) => { return Err(e); },
@@ -74,7 +75,6 @@ impl Situation for SitStrPhantom {
 }
 
 fn is_phantomstringfood(c: u8) -> bool {
-	c >= b'+'
-	&& c != b';' && c != b'<' && c != b'>'
-	&& c != b'\\' && c != b'`' && c != b'|'
+	c >= b'+' && is_word(c)
+	&& c != b'?' && c != b'\\'
 }