fix Linter ControlStatementSpacing raise incorrect =

sds#101
sds#101

lib/slim_lint/linter/control_statement_spacing.rb

@@ -9,8 +9,15 @@ class Linter::ControlStatementSpacing < Linter
 
     on [:html, :tag, anything, [],
          [:slim, :output, anything, capture(:ruby, anything)]] do |sexp|
-      # Fetch original Slim code that contains an element with a control statement.
-      line = document.source_lines[sexp.line - 1]
+      # Process original slim code so that multi-line attributes become single line.
+      # And store the correction line count
+      source = merge_multiline_attributes(document.source_lines)
+
+      # Fetch processed Slim code that contains an element with a control statement.
+      line = source[sexp.line - 1][:line]
+      # Apply correction to the line count.
+      sexp.line += source[sexp.line - 1][:line_count]
+
 
       # Remove any Ruby code, because our regexp below must not match inside Ruby.
       ruby = captures[:ruby]
@@ -20,5 +27,29 @@ class Linter::ControlStatementSpacing < Linter
 
       report_lint(sexp, MESSAGE)
     end
+
+    private
+
+    def merge_multiline_attributes(source_lines)
+      result = []
+      memo = ''
+      correction_line_count = 0
+
+      source_lines.each do |line|
+        memo += line.chomp('\\')
+
+        # Lines ending in a backslash are concatenated with the next line
+        # And count the number of lines to correct the sexp line count.
+        if line.match?(/\\$/) then
+          correction_line_count += 1
+          next
+        end
+
+        # Add merged rows and correction line count to the result and reset the memo
+        result << {line: memo, line_count: correction_line_count}
+        memo = ''
+      end
+      result
+    end
   end
 end