Allow whitespace in more places

Fixes: https://github.com/kdl-org/kdl/issues/355

CHANGELOG.md

@@ -46,6 +46,13 @@
 * The last node in a child block no longer needs to be terminated with `;`,
   even if the closing `}` is on the same line, so this is now a legal node:
   `node {foo;bar;baz}`
+* More places allow whitespace (node-spaces, specifically) now. With great
+  power comes great responsibility:
+  * Inside `(foo)` annotations (so, `( foo )` would be legal (`( f oo )` would
+    not be, since it has two identifiers))
+  * Between annotations and the thing they're annotating (`(blah) node (thing)
+    1 y= (who) 2`)
+  * Around `=` for props (`x = 1`)
 
 ### KQL
 

SPEC.md

@@ -527,7 +527,7 @@ node-space := plain-node-space+ ('/-' plain-node-space* (node-prop-or-arg | node
 required-node-space := node-space* plain-node-space+
 optional-node-space := node-space*
 
-base-node := type? identifier (required-node-space node-prop-or-arg)* (required-node-space node-children)?
+base-node := type? optional-node-space identifier (required-node-space node-prop-or-arg)* (required-node-space node-children)?
 node := base-node optional-node-space node-terminator
 final-node := base-node optional-node-space node-terminator?
 node-prop-or-arg := prop | value
@@ -541,9 +541,9 @@ numberish-ident := sign ((identifier-char - digit) identifier-char*)?
 identifier-char := unicode - line-space - [\\/(){};\[\]="#] - disallowed-literal-code-points
 
 keyword := '#' (boolean | 'null')
-prop := identifier '=' value
-value := type? (identifier | string | number | keyword)
-type := '(' identifier ')'
+prop := identifier optional-node-space '=' optional-node-space value
+value := type? optional-node-space (identifier | string | number | keyword)
+type := '(' optional-node-space identifier optional-node-space ')'
 
 string := raw-string | escaped-string
 escaped-string := '"' string-character* '"'