diff --git a/lib/syntax_suggest/capture_code_context.rb b/lib/syntax_suggest/capture_code_context.rb
index 1f232cf..5de9ec0 100644
--- a/lib/syntax_suggest/capture_code_context.rb
+++ b/lib/syntax_suggest/capture_code_context.rb
@@ -15,7 +15,7 @@ module SyntaxSuggest
   #
   # 1. Sanitize/format input source
   # 2. Search for invalid blocks
-  # 3. Format invalid blocks into something meaninful
+  # 3. Format invalid blocks into something meaningful
   #
   # This class handles the third part.
   #
diff --git a/lib/syntax_suggest/clean_document.rb b/lib/syntax_suggest/clean_document.rb
index 2790cca..ba307af 100644
--- a/lib/syntax_suggest/clean_document.rb
+++ b/lib/syntax_suggest/clean_document.rb
@@ -10,7 +10,7 @@ module SyntaxSuggest
   #
   # 1. Sanitize/format input source
   # 2. Search for invalid blocks
-  # 3. Format invalid blocks into something meaninful
+  # 3. Format invalid blocks into something meaningful
   #
   # This class handles the first part.
   #
diff --git a/lib/syntax_suggest/code_frontier.rb b/lib/syntax_suggest/code_frontier.rb
index 0f870d0..38d5375 100644
--- a/lib/syntax_suggest/code_frontier.rb
+++ b/lib/syntax_suggest/code_frontier.rb
@@ -8,7 +8,7 @@ module SyntaxSuggest
   #
   # 1. Sanitize/format input source
   # 2. Search for invalid blocks
-  # 3. Format invalid blocks into something meaninful
+  # 3. Format invalid blocks into something meaningful
   #
   # The Code frontier is a critical part of the second step
   #
diff --git a/lib/syntax_suggest/mini_stringio.rb b/lib/syntax_suggest/mini_stringio.rb
index ee5192b..1a82572 100644
--- a/lib/syntax_suggest/mini_stringio.rb
+++ b/lib/syntax_suggest/mini_stringio.rb
@@ -1,8 +1,14 @@
+# frozen_string_literal: true
+
 module SyntaxSuggest
   # Mini String IO [Private]
   #
   # Acts like a StringIO with reduced API, but without having to require that
   # class.
+  #
+  # The original codebase emitted directly to $stderr, but now SyntaxError#detailed_message
+  # needs a string output. To accomplish that we kept the original print infrastructure in place and
+  # added this class to accumulate the print output into a string.
   class MiniStringIO
     EMPTY_ARG = Object.new