Includes additional twig syntax featires

[mogsie]

The twig tags "from," "import" and "use" are not understood by patternlab. They all use the same techniques as include, embed etc when resolving template names.

• from is documented in macros:
• import
• use

Some twig templates use {%- ... -%} syntax that gobble up the whitespace on each side. This change ensures that this syntax is understood when looking for partials.

• Whitespace control

I wasn't aware of the {%~ syntax (line-whitespace trimming) introduced in 2.8; I could add support for that too.

[JosefBredereck]

Some twig templates use {%- ... -%} syntax that gobble up the whitespace on each side. This change ensures that this syntax is understood when looking for partials.

Will this break any existing functionality?

[mogsie]

Will this break any existing functionality?

No, it shouldn't. This code is only used when determining the "graph" of template dependencies, as far a I know. Twig understands the {%- .. -%} syntax, and has done so forever. When you use {%- include in a twig file, patternlab doesn't detect the dependency between this template and the included template.

[mogsie]

I noticed I changed "engine-twig" and not "engine-twig-php" which I linked for documentation purposes; I should probably do both, and align this properly.