Allow escaping meta characters with backslashes

One can escape meta characters in extended-search mode with backslashes.

  Prefixes:
    \'
    \!
    \^

  Suffix:
    \$

  Term separator:
    \<SPACE>

To keep things simple, we are not going to support escaping of escaped
sequences (e.g. \\') for matching them literally.

Since this is a breaking change, we will bump the minor version.

Close #444

1 files changed, 6 insertions, 6 deletions

diff --git a/src/pattern_test.go b/src/pattern_test.go
index 9d56ff9f..efb1ef2d 100644
--- a/src/pattern_test.go
+++ b/src/pattern_test.go
@@ -165,15 +165,15 @@ func TestCacheKey(t *testing.T) {
 			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
 		}
 		if pat.cacheable != cacheable {
-			t.Errorf("Expected: %s, actual: %s (%s)", cacheable, pat.cacheable, patStr)
+			t.Errorf("Expected: %t, actual: %t (%s)", cacheable, pat.cacheable, patStr)
 		}
 		clearPatternCache()
 	}
 	test(false, "foo !bar", "foo !bar", true)
 	test(false, "foo | bar !baz", "foo | bar !baz", true)
-	test(true, "foo  bar  baz", "foo bar baz", true)
+	test(true, "foo  bar  baz", "foo\tbar\tbaz", true)
 	test(true, "foo !bar", "foo", false)
-	test(true, "foo !bar   baz", "foo baz", false)
+	test(true, "foo !bar   baz", "foo\tbaz", false)
 	test(true, "foo | bar baz", "baz", false)
 	test(true, "foo | bar | baz", "", false)
 	test(true, "foo | bar !baz", "", false)
@@ -192,11 +192,11 @@ func TestCacheable(t *testing.T) {
 		}
 		clearPatternCache()
 	}
-	test(true, "foo bar", "foo bar", true)
-	test(true, "foo 'bar", "foo bar", false)
+	test(true, "foo bar", "foo\tbar", true)
+	test(true, "foo 'bar", "foo\tbar", false)
 	test(true, "foo !bar", "foo", false)
 
-	test(false, "foo bar", "foo bar", true)
+	test(false, "foo bar", "foo\tbar", true)
 	test(false, "foo 'bar", "foo", false)
 	test(false, "foo '", "foo", true)
 	test(false, "foo 'bar", "foo", false)