Avoid modifying the default resources limits hash.
Merge pull request #453 from Shopify/no-modify-default-resource-limit

Avoid modifying the default resources limits hash.
Line numbers for all parse errors
Test line number of errors in nested blocks.
Merge pull request #455 from Shopify/parse_error_line_numbers

Line numbers for all parse errors
Parse expressions in Liquid::Variable#parse.
Remove unused Block#end_tag method.

Although the method is called, it is defined with an empty body and not
overridden to do anything else.
Merge pull request #446 from Shopify/remove-end-tag

Remove unused Block#end_tag method.
Use pop over shift to avoid reverse
Merge pull request #459 from Shopify/pop_vs_shift

Use pop over shift to avoid reverse
flat_map
Merge pull request #462 from Shopify/flat_map

nodelist flat_map over map.flatten
Merge pull request #443 from Shopify/completely-parse-variables

Parse expressions in Liquid::Variable#parse.
Separate ? and - into special tokens
Don't allow - to end a variable name
Merge pull request #463 from Shopify/stricter-identifiers

Separate ? and - into special tokens
Avoid parallel assignments
Merge pull request #465 from Shopify/avoid_multi_assigns

Avoid parallel assignments
replace the regex sequence w with [[:word:]] to be more accepting