test(cli): Verify block-ignores via regex

Author: epage

crates/typos-cli/tests/cmd/ignore-block.in/_typos.toml

@@ -0,0 +1,5 @@
+[default]
+extend-ignore-re = ["#\\s*spellchecker:off\\s*\\n.*\\n\\s*#\\s*spellchecker:on"]
+
+[default.extend-identifiers]
+hello = "goodbye"

crates/typos-cli/tests/cmd/ignore-block.in/file.ignore

@@ -0,0 +1,5 @@
+hello
+# spellchecker:off
+hello
+# spellchecker:on
+hello

crates/typos-cli/tests/cmd/ignore-block.toml

@@ -0,0 +1,18 @@
+bin.name = "typos"
+stdin = "--sort"
+stdout = """
+error: `hello` should be `goodbye`
+  --> ./file.ignore:1:1
+  |
+1 | hello
+  | ^^^^^
+  |
+error: `hello` should be `goodbye`
+  --> ./file.ignore:5:1
+  |
+5 | hello
+  | ^^^^^
+  |
+"""
+stderr = ""
+status.code = 2