Fix an AST and token incompatibility for Prism::Translation::Parser

Fixes #2515.

This PR fixes an AST and token incompatibility between Parser gem and `Prism::Translation::Parser`
for string literal with line breaks.

Author: koic

lib/prism/translation/parser/compiler.rb

@@ -1487,9 +1487,23 @@ def visit_string_node(node)
           elsif node.opening == "?"
             builder.character([node.unescaped, srange(node.location)])
           else
+            parts = if node.unescaped.lines.count <= 1
+              [builder.string_internal([node.unescaped, srange(node.content_loc)])]
+            else
+              start_offset = node.content_loc.start_offset
+
+              node.unescaped.lines.map do |line|
+                end_offset = start_offset + line.length
+                offsets = srange_offsets(start_offset, end_offset)
+                start_offset = end_offset
+
+                builder.string_internal([line, offsets])
+              end
+            end
+
             builder.string_compose(
               token(node.opening_loc),
-              [builder.string_internal([node.unescaped, srange(node.content_loc)])],
+              parts,
               token(node.closing_loc)
             )
           end

lib/prism/translation/parser/lexer.rb

@@ -281,7 +281,7 @@ def to_a
                 value = ""
                 location = Range.new(source_buffer, offset_cache[next_location.start_offset], offset_cache[next_location.end_offset])
                 index += 1
-              elsif ["\"", "'"].include?(value) && (next_token = lexed[index][0]) && next_token.type == :STRING_CONTENT && (next_next_token = lexed[index + 1][0]) && next_next_token.type == :STRING_END
+              elsif ["\"", "'"].include?(value) && (next_token = lexed[index][0]) && next_token.type == :STRING_CONTENT && next_token.value.lines.count <= 1 && (next_next_token = lexed[index + 1][0]) && next_next_token.type == :STRING_END
                 next_location = token.location.join(next_next_token.location)
                 type = :tSTRING
                 value = next_token.value

test/prism/fixtures/dstring.txt

@@ -0,0 +1,2 @@
+"foo
+  bar"