Fix parsing acronym definitions

See #813.

src/parser/latex.rs

@@ -1108,15 +1108,15 @@ impl<'a> Parser<'a> {
 
         if self.lexer.peek() == Some(L_CURLY) {
             self.curly_group_word();
-        } else {
-            self.builder.token(MISSING.into(), "");
+        }
+
+        if self.lexer.peek() == Some(L_BRACK) {
+            self.brack_group();
         }
 
         for _ in 0..2 {
             if self.lexer.peek() == Some(L_CURLY) {
                 self.curly_group();
-            } else {
-                self.builder.token(MISSING.into(), "");
             }
         }
 

src/parser/latex/lexer.rs

@@ -299,7 +299,7 @@ enum CommandNameToken {
 
     #[token("\\newacronym")]
     #[token("\\newacro")]
-    #[token("\\newacrodef")]
+    #[token("\\acrodef")]
     #[token("\\acro")]
     #[token("\\newacroindefinite")]
     #[token("\\acrodefindefinite")]

src/parser/snapshots/texlab__parser__latex__tests__parse@acronym_package.txt.snap

@@ -0,0 +1,29 @@
+---
+source: src/parser/latex.rs
+expression: root
+---
+ROOT@0..35
+  PREAMBLE@0..35
+    ACRONYM_DEFINITION@0..35
+      ACRONYM_DEFINITION_NAME@0..5 "\\acro"
+      CURLY_GROUP_WORD@5..10
+        L_CURLY@5..6 "{"
+        KEY@6..9
+          WORD@6..9 "fps"
+        R_CURLY@9..10 "}"
+      BRACK_GROUP@10..15
+        L_BRACK@10..11 "["
+        TEXT@11..14
+          WORD@11..14 "FPS"
+        R_BRACK@14..15 "]"
+      CURLY_GROUP@15..35
+        L_CURLY@15..16 "{"
+        TEXT@16..33
+          WORD@16..22 "Frames"
+          WHITESPACE@22..23 " "
+          WORD@23..26 "per"
+          WHITESPACE@26..27 " "
+          WORD@27..33 "Second"
+        R_CURLY@33..34 "}"
+        LINE_BREAK@34..35 "\n"
+

src/parser/test_data/latex/glossary/acronym_package.txt

@@ -0,0 +1 @@
+\acro{fps}[FPS]{Frames per Second}

tests/integration/lsp/text_document/completion.rs

@@ -126,6 +126,20 @@ fn acronym_ref_open_brace() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn acronym_package_ref() -> Result<()> {
+    assert_items!(complete(
+        r#"
+%TEX main.tex
+%SRC \acrodef{fpsLabel}[FPS]{Frames per Second}
+%SRC \ac{f
+%CUR     ^
+%1.1     ^"#
+    )?);
+
+    Ok(())
+}
+
 #[test]
 fn glossary_ref_simple() -> Result<()> {
     assert_items!(complete(

tests/integration/lsp/text_document/snapshots/integration__lsp__text_document__completion__acronym_package_ref.snap

@@ -0,0 +1,17 @@
+---
+source: tests/integration/lsp/text_document/completion.rs
+expression: "complete(r#\"\n%TEX main.tex\n%SRC \\acrodef{fpsLabel}[FPS]{Frames per Second}\n%SRC \\ac{f\n%CUR     ^\n%1.1     ^\"#)?"
+---
+[
+  {
+    "data": "[data]",
+    "kind": 1,
+    "label": "fpsLabel",
+    "preselect": false,
+    "sortText": "[sortText]",
+    "textEdit": {
+      "range": "[range]",
+      "newText": "fpsLabel"
+    }
+  }
+]