Fix: trim filenames while resolving wikilinks

Obsidian trims the filename part in a [[WikiLink|label]], so each of
these are equivalent:

[[wikilink]]
[[ wikilink ]]
[[ wikilink |wikilink]]

Obsidian-export now behaves similarly.

Fixes #188

src/references.rs

@@ -73,9 +73,9 @@ impl<'a> ObsidianNoteReference<'a> {
         let captures = OBSIDIAN_NOTE_LINK_RE
             .captures(text)
             .expect("note link regex didn't match - bad input?");
-        let file = captures.name("file").map(|v| v.as_str());
+        let file = captures.name("file").map(|v| v.as_str().trim());
         let label = captures.name("label").map(|v| v.as_str());
-        let section = captures.name("section").map(|v| v.as_str());
+        let section = captures.name("section").map(|v| v.as_str().trim());
 
         ObsidianNoteReference {
             file,

tests/testdata/expected/main-samples/issue-188-wikilinks-need-trimming.md

@@ -0,0 +1,17 @@
+Obsidian trims space before and after the filename in a wikilink target.
+These should all be the same:
+
+[foo](foo.md)
+[foo](foo.md)
+[foo](foo.md)
+[foo](foo.md)
+
+[foo](foo.md)
+[foo](foo.md)
+[foo](foo.md)
+[foo](foo.md)
+
+[foo > ^abc](foo.md#abc)
+[foo > ^abc](foo.md#abc)
+[foo > ^abc](foo.md#abc)
+[foo > ^abc](foo.md#abc)

tests/testdata/input/main-samples/issue-188-wikilinks-need-trimming.md

@@ -0,0 +1,17 @@
+Obsidian trims space before and after the filename in a wikilink target.
+These should all be the same:
+
+[[foo]]
+[[ foo]]
+[[foo ]]
+[[    foo    ]]
+
+[[foo|foo]]
+[[ foo|foo]]
+[[foo |foo]]
+[[    foo    |foo]]
+
+[[foo#^abc]]
+[[foo#^abc ]]
+[[foo#^abc |foo > ^abc]]
+[[ foo#^abc ]]