test for multiline comments in subtraction

src/atrule/if_rule.rs

@@ -8,7 +8,8 @@ use crate::error::SassResult;
 use crate::scope::Scope;
 use crate::selector::Selector;
 use crate::utils::{
-    devour_whitespace, eat_ident, read_until_closing_curly_brace, read_until_open_curly_brace, devour_whitespace_or_comment
+    devour_whitespace, devour_whitespace_or_comment, eat_ident, read_until_closing_curly_brace,
+    read_until_open_curly_brace,
 };
 use crate::value::Value;
 use crate::{Stmt, Token};

src/utils/comment_whitespace.rs

@@ -52,8 +52,8 @@ pub(crate) fn devour_whitespace_or_comment<I: Iterator<Item = Token>>(
                 '/' => read_until_newline(toks),
                 _ => {
                     toks.reset_view();
-                    return Ok(found_whitespace)
-                },
+                    return Ok(found_whitespace);
+                }
             };
             found_whitespace = true;
             continue;

tests/subtraction.rs

@@ -204,3 +204,8 @@ test!(
     "a {\n  plus-after-minus: 1 - + 2;\n}\n",
     "a {\n  plus-after-minus: -1;\n}\n"
 );
+test!(
+    multiline_comments_between_operands,
+    "a {\n  color: 1/**/-/**/1;\n}\n",
+    "a {\n  color: 0;\n}\n"
+);

tests/unary.rs

@@ -17,10 +17,15 @@ test!(
 );
 test!(unary_pos_color, "a {\n  color: +\"foo\";\n}\n");
 test!(
-    unary_pos_number,
+    unary_pos_number_unit,
     "a {\n  color: +1px;\n}\n",
     "a {\n  color: 1px;\n}\n"
 );
+test!(
+    unary_pos_number,
+    "a {\n  color: +10;\n}\n",
+    "a {\n  color: 10;\n}\n"
+);
 test!(
     unary_pos_in_list,
     "a {\n  color: bar,+ \"bar\" - foo;\n}\n",