3 files changed, 8 insertions, 7 deletions
diff --git a/Libraries/LibGUI/TextDocument.cpp b/Libraries/LibGUI/TextDocument.cpp
index 51d7323cd8..a303824a63 100644
--- a/Libraries/LibGUI/TextDocument.cpp
+++ b/Libraries/LibGUI/TextDocument.cpp
@@ -86,7 +86,7 @@ void TextDocument::set_text(const StringView& text)
 size_t TextDocumentLine::first_non_whitespace_column() const
 {
     for (size_t i = 0; i < length(); ++i) {
-        if (!isspace(m_text[(int)i]))
+        if (!isspace(m_text[i]))
             return i;
     }
     return length();
diff --git a/Libraries/LibGUI/TextDocument.h b/Libraries/LibGUI/TextDocument.h
index 51234450b7..76ce03d23a 100644
--- a/Libraries/LibGUI/TextDocument.h
+++ b/Libraries/LibGUI/TextDocument.h
@@ -75,9 +75,9 @@ public:
     static NonnullRefPtr<TextDocument> create(Client* client = nullptr);
     ~TextDocument();
 
-    size_t line_count() const { return (size_t)m_lines.size(); }
-    const TextDocumentLine& line(size_t line_index) const { return m_lines[(int)line_index]; }
-    TextDocumentLine& line(size_t line_index) { return m_lines[(int)line_index]; }
+    size_t line_count() const { return m_lines.size(); }
+    const TextDocumentLine& line(size_t line_index) const { return m_lines[line_index]; }
+    TextDocumentLine& line(size_t line_index) { return m_lines[line_index]; }
 
     void set_spans(const Vector<TextDocumentSpan>& spans) { m_spans = spans; }
 
@@ -88,7 +88,7 @@ public:
 
     bool has_spans() const { return !m_spans.is_empty(); }
     const Vector<TextDocumentSpan>& spans() const { return m_spans; }
-    void set_span_at_index(size_t index, TextDocumentSpan span) { m_spans[(int)index] = move(span); }
+    void set_span_at_index(size_t index, TextDocumentSpan span) { m_spans[index] = move(span); }
 
     void append_line(NonnullOwnPtr<TextDocumentLine>);
     void remove_line(size_t line_index);
@@ -156,7 +156,7 @@ public:
 
     StringView view() const { return { characters(), (size_t)length() }; }
     const char* characters() const { return m_text.data(); }
-    size_t length() const { return (size_t)m_text.size() - 1; }
+    size_t length() const { return m_text.size() - 1; }
     void set_text(TextDocument&, const StringView&);
     void append(TextDocument&, char);
     void prepend(TextDocument&, char);
diff --git a/Libraries/LibGUI/TextEditor.cpp b/Libraries/LibGUI/TextEditor.cpp
index fa501d3f95..6ee66b43f5 100644
--- a/Libraries/LibGUI/TextEditor.cpp
+++ b/Libraries/LibGUI/TextEditor.cpp
@@ -559,7 +559,8 @@ void TextEditor::move_selected_lines_down()
     get_selection_line_boundaries(first_line, last_line);
 
     auto& lines = document().lines();
-    if (last_line >= (size_t)(lines.size() - 1))
+    ASSERT(lines.size() != 0);
+    if (last_line >= lines.size() - 1)
         return;
 
     lines.insert((int)first_line, lines.take((int)last_line + 1));