Make line-space a superset of node-space (#440)

* Allow escline everywhere

* escline tests

Author: tjol

SPEC.md

@@ -910,14 +910,14 @@ unicode-space := See Table (All White_Space unicode characters which are not `ne
 single-line-comment := '//' ^newline* (newline | eof)
 multi-line-comment := '/*' commented-block
 commented-block := '*/' | (multi-line-comment | '*' | '/' | [^*/]+) commented-block
-slashdash := '/-' (node-space | line-space)*
+slashdash := '/-' line-space*
 
 // Whitespace
 ws := unicode-space | multi-line-comment
 escline := '\\' ws* (single-line-comment | newline | eof)
 newline := See Table (All Newline White_Space)
 // Whitespace where newlines are allowed.
-line-space := newline | ws | single-line-comment
+line-space := node-space | newline | single-line-comment
 // Whitespace within nodes, where newline-ish things must be esclined.
 node-space := ws* escline ws* | ws+
 ```

tests/test_cases/expected_kdl/escline_after_semicolon.kdl

@@ -0,0 +1,2 @@
+node
+node

tests/test_cases/expected_kdl/escline_empty_line.kdl

@@ -0,0 +1 @@
+node

tests/test_cases/expected_kdl/escline_in_child_block.kdl

@@ -0,0 +1,4 @@
+parent {
+    child
+    child
+}

tests/test_cases/expected_kdl/escline_node_type.kdl

@@ -0,0 +1 @@
+(type)node

tests/test_cases/expected_kdl/escline_slashdash.kdl

@@ -0,0 +1 @@
+node

tests/test_cases/input/escline_after_semicolon.kdl

@@ -0,0 +1,2 @@
+node; \
+node

tests/test_cases/input/escline_empty_line.kdl

@@ -0,0 +1,3 @@
+\
+
+node

tests/test_cases/input/escline_in_child_block.kdl

@@ -0,0 +1,5 @@
+parent {
+    child
+    \ // comment
+    child
+}

tests/test_cases/input/escline_node_type.kdl

@@ -0,0 +1,2 @@
+\
+(type)node

tests/test_cases/input/escline_slashdash.kdl

@@ -0,0 +1,4 @@
+node
+\
+/-
+node