Add t tags for hashtags

[dsaxton]

$ cargo test -p notedeck_columns test_extract_hashtags

    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
     Running unittests src/lib.rs (target/debug/deps/notedeck_columns-dfddfaabc1efa03f)

running 1 test
test post::tests::test_extract_hashtags ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 22 filtered out; finished in 0.00s

Also tested manually in Notedeck and it seems to work.

Relates to #286

[jb55]

#tag1,#tag2 should pass as well -> ["tag1", "tag2"]

[jb55]

diff --git a/crates/notedeck_columns/src/post.rs b/crates/notedeck_columns/src/post.rs
index 1943278cdd4c..0ca834489f51 100644
--- a/crates/notedeck_columns/src/post.rs
+++ b/crates/notedeck_columns/src/post.rs
@@ -160,7 +160,7 @@ mod tests {
             ("Duplicate #tag #tag #tag", vec!["tag"]),
             ("Mixed case #TaG #tag #TAG", vec!["tag"]),
             (
-                "#tag1, #tag2, #tag3 with commas",
+                "#tag1,#tag2,#tag3 with commas",
                 vec!["tag1", "tag2", "tag3"],
             ),
         ];

assertion `left == right` failed: Failed for input: #tag1,#tag2,#tag3 with commas
  left: {"tag1,#tag2,#tag3"}
 right: {"tag1", "tag3", "tag2"}

[dsaxton]

diff --git a/crates/notedeck_columns/src/post.rs b/crates/notedeck_columns/src/post.rs
index 1943278cdd4c..0ca834489f51 100644
--- a/crates/notedeck_columns/src/post.rs
+++ b/crates/notedeck_columns/src/post.rs
@@ -160,7 +160,7 @@ mod tests {
             ("Duplicate #tag #tag #tag", vec!["tag"]),
             ("Mixed case #TaG #tag #TAG", vec!["tag"]),
             (
-                "#tag1, #tag2, #tag3 with commas",
+                "#tag1,#tag2,#tag3 with commas",
                 vec!["tag1", "tag2", "tag3"],
             ),
         ];

assertion `left == right` failed: Failed for input: #tag1,#tag2,#tag3 with commas
  left: {"tag1,#tag2,#tag3"}
 right: {"tag1", "tag3", "tag2"}

Fixed. Not sure about #tag1.#tag2 but I made that two separate tags (although periods within a hashtag would not work)