Add unterminated construct tests

Author: thomasmarshall

test/prism/errors/unterminated_begin.txt

@@ -0,0 +1,4 @@
+begin
+     ^ unexpected end-of-input, assuming it is closing the parent top level context
+     ^ expected an `end` to close the `begin` statement
+

test/prism/errors/unterminated_begin_upcase.txt

@@ -0,0 +1,4 @@
+BEGIN {
+       ^ unexpected end-of-input, assuming it is closing the parent top level context
+       ^ expected a `}` to close the `BEGIN` statement
+

test/prism/errors/unterminated_block_do_end.txt

@@ -0,0 +1,4 @@
+foo do
+      ^ unexpected end-of-input, assuming it is closing the parent top level context
+      ^ expected a block beginning with `do` to end with `end`
+

test/prism/errors/unterminated_class.txt

@@ -0,0 +1,4 @@
+class Foo
+         ^ unexpected end-of-input, assuming it is closing the parent top level context
+         ^ expected an `end` to close the `class` statement
+

test/prism/errors/unterminated_def.txt

@@ -0,0 +1,5 @@
+def foo
+       ^ expected a delimiter to close the parameters
+       ^ unexpected end-of-input, assuming it is closing the parent top level context
+       ^ expected an `end` to close the `def` statement
+

test/prism/errors/unterminated_end_upcase.txt

@@ -0,0 +1,4 @@
+END {
+     ^ unexpected end-of-input, assuming it is closing the parent top level context
+     ^ expected a `}` to close the `END` statement
+

test/prism/errors/unterminated_for.txt

@@ -0,0 +1,5 @@
+for x in y
+          ^ unexpected end-of-input; expected a 'do', newline, or ';' after the 'for' loop collection
+          ^ unexpected end-of-input, assuming it is closing the parent top level context
+          ^ expected an `end` to close the `for` loop
+

test/prism/errors/unterminated_if.txt

@@ -0,0 +1,5 @@
+if true
+       ^ expected `then` or `;` or '\n'
+       ^ unexpected end-of-input, assuming it is closing the parent top level context
+       ^ expected an `end` to close the conditional clause
+

test/prism/errors/unterminated_if_else.txt

@@ -0,0 +1,5 @@
+if true
+else
+    ^ unexpected end-of-input, assuming it is closing the parent top level context
+    ^ expected an `end` to close the `else` clause
+

test/prism/errors/unterminated_lambda_brace.txt

@@ -0,0 +1,4 @@
+-> {
+    ^ unexpected end-of-input, assuming it is closing the parent top level context
+    ^ expected a lambda block beginning with `{` to end with `}`
+