Style improvements

src/ameba/rules/comparison_to_boolean.cr

@@ -11,6 +11,7 @@ module Ameba::Rules
   # This is because these expressions evaluate to `true` or `false`, so you
   # could get the same result by using either the variable directly,
   # or negating the variable.
+  #
   struct ComparisonToBoolean < Rule
     def test(source)
       AST::CallVisitor.new self, source

src/ameba/rules/debugger_statement.cr

@@ -3,6 +3,7 @@ module Ameba::Rules
   #
   # This is because we don't want debugger breakpoints accidentally being
   # committed into our codebase.
+  #
   struct DebuggerStatement < Rule
     def test(source)
       AST::CallVisitor.new self, source

src/ameba/rules/line_length.cr

@@ -1,5 +1,6 @@
 module Ameba::Rules
   # A rule that disallows lines longer than 79 symbols.
+  #
   struct LineLength < Rule
     def test(source)
       source.lines.each_with_index do |line, index|

src/ameba/rules/literal_in_condition.cr

@@ -12,6 +12,7 @@ module Ameba::Rules
   #   :ok
   # end
   # ```
+  #
   struct LiteralInCondition < Rule
     include AST::Util
 

src/ameba/rules/literal_in_interpolation.cr

@@ -6,7 +6,7 @@ module Ameba::Rules
   #
   # ```
   # "Hello, #{:Ary}"
-  # "The are #{4} cats"
+  # "There are #{4} cats"
   # ```
   #
   struct LiteralInInterpolation < Rule
@@ -17,12 +17,8 @@ module Ameba::Rules
     end
 
     def test(source, node : Crystal::StringInterpolation)
-      has_literal = node.expressions.any? do |e|
-        !string_literal?(e) && literal?(e)
-      end
-
-      return unless has_literal
-
+      found = node.expressions.any? { |e| !string_literal?(e) && literal?(e) }
+      return unless found
       source.error self, node.location.try &.line_number,
         "Literal value found in interpolation"
     end

src/ameba/rules/trailing_blank_lines.cr

@@ -1,5 +1,6 @@
 module Ameba::Rules
   # A rule that disallows trailing blank lines at the end of the source file.
+  #
   struct TrailingBlankLines < Rule
     def test(source)
       if source.lines.size > 1 && source.lines[-2, 2].join.strip.empty?

src/ameba/rules/trailing_whitespace.cr

@@ -1,5 +1,6 @@
 module Ameba::Rules
   # A rule that disallows trailing whitespaces.
+  #
   struct TrailingWhitespace < Rule
     def test(source)
       source.lines.each_with_index do |line, index|

src/ameba/rules/unless_else.cr

@@ -35,6 +35,7 @@ module Ameba::Rules
   #   :one
   # end
   # ```
+  #
   struct UnlessElse < Rule
     def test(source)
       AST::UnlessVisitor.new self, source