diff -r fec90b848f4b -r e0300c2c4e95 make/project.xml
--- a/make/project.xml	Fri Jan 05 20:35:13 2024 +0100
+++ b/make/project.xml	Sun Jan 07 11:01:33 2024 +0100
@@ -1,113 +1,112 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://unixwork.de/uwproj">
-	<config>
-		<var name="src_dir" exec="true">pwd</var>
-		<var name="DOXYGEN" exec="true">command -v doxygen</var>
-		<var name="PANDOC" exec="true">command -v pandoc</var>
-	</config>
+    <config>
+        <var name="src_dir" exec="true">pwd</var>
+        <var name="DOXYGEN" exec="true">command -v doxygen</var>
+        <var name="PANDOC" exec="true">command -v pandoc</var>
+    </config>
 
-	<dependency>
-		<make>
-# library version
-VERSION=3.1.0
-LIBVERSION=4.1.0
-LIBVERSION_MAJOR=4
+    <dependency>
+        <make>
+            # library version
+            VERSION=3.1.0
+            LIBVERSION=4.1.0
+            LIBVERSION_MAJOR=4
 
-# build directory structure !! do not change or override !!
-build_dir=${src_dir}/build
-docs_dir=${src_dir}/build/docs
-dist_dir=${src_dir}/dist
-		</make>
-	</dependency>
+            # build directory structure !! do not change or override !!
+            build_dir=${src_dir}/build
+            docs_dir=${src_dir}/build/docs
+            dist_dir=${src_dir}/dist
+        </make>
+    </dependency>
 
-	<dependency name="file-tools">
-		<make>
-MKDIR=/bin/mkdir -p
-RMFILE=/bin/rm -f
-RMDIR=/bin/rm -f -R
-COPYFILE=/bin/cp -f
-COPYALL=/bin/cp -f -R
-SYMLINK=/bin/ln -s
-		</make>
-	</dependency>
+    <dependency name="file-tools">
+        <make>
+            MKDIR=/bin/mkdir -p
+            RMFILE=/bin/rm -f
+            RMDIR=/bin/rm -f -R
+            COPYFILE=/bin/cp -f
+            COPYALL=/bin/cp -f -R
+            SYMLINK=/bin/ln -s
+        </make>
+    </dependency>
 
-	<dependency name="c" platform="mingw">
-		<lang>c</lang>
-		<make>
-AR=ar
-ARFLAGS=r
-STLIB_EXT=.lib
-SHLIB_EXT=.dll
-		</make>
-	</dependency>
+    <dependency name="c" platform="mingw">
+        <lang>c</lang>
+        <make>
+            AR=ar
+            ARFLAGS=r
+            STLIB_EXT=.lib
+            SHLIB_EXT=.dll
+        </make>
+    </dependency>
 
-	<dependency name="c" platform="macos">
-		<lang>c</lang>
-		<make>
-AR=ar
-ARFLAGS=r
-STLIB_EXT=.a
-SHLIB_EXT=.dylib
-		</make>
-	</dependency>
+    <dependency name="c" platform="macos">
+        <lang>c</lang>
+        <make>
+            AR=ar
+            ARFLAGS=r
+            STLIB_EXT=.a
+            SHLIB_EXT=.dylib
+        </make>
+    </dependency>
 
-	<dependency name="c" platform="unix">
-		<lang>c</lang>
-		<make>
-AR=ar
-ARFLAGS=r
-STLIB_EXT=.a
-SHLIB_EXT=.so
-		</make>
-	</dependency>
+    <dependency name="c" platform="unix">
+        <lang>c</lang>
+        <make>
+            AR=ar
+            ARFLAGS=r
+            STLIB_EXT=.a
+            SHLIB_EXT=.so
+        </make>
+    </dependency>
 
-	<dependency name="doxygen">
-		<test>test -n "$DOXYGEN"</test>
-	</dependency>
+    <dependency name="doxygen">
+        <test>test -n "$DOXYGEN"</test>
+    </dependency>
 
-	<dependency name="pandoc">
-		<test>test -n "$PANDOC"</test>
-	</dependency>
+    <dependency name="pandoc">
+        <test>test -n "$PANDOC"</test>
+    </dependency>
+
+    <dependency name="coverage">
+        <cflags>\${COVERAGE_CFLAGS}</cflags>
+        <ldflags>\${COVERAGE_LDFLAGS}</ldflags>
+    </dependency>
 
-	<dependency name="coverage">
-		<cflags>\${COVERAGE_CFLAGS}</cflags>
-		<ldflags>\${COVERAGE_LDFLAGS}</ldflags>
-	</dependency>
-	
-	<target>
-		<option arg="with-docs">
-			<value str="all">
-				<dependencies>pandoc,doxygen</dependencies>
-				<make>
-# Documentation
-WITH_DOCS_API=yes
-WITH_DOCS_HTML=yes
-				</make>
-			</value>
-			<value str="html">
-				<dependencies>pandoc</dependencies>
-				<make>
-# Documentation
-WITH_DOCS_HTML=yes
-				</make>
-			</value>
-			<value str="api">
-				<dependencies>doxygen</dependencies>
-				<make>
-# Documentation
-WITH_DOCS_API=yes
-				</make>
-			</value>
-			<value str="none"/>
-			<default value="all"/>
-			<default value="html"/>
-			<default value="api"/>
-			<default value="none"/>
-		</option>
-		<feature name="coverage">
-			<dependencies>coverage</dependencies>
-		</feature>
-		<dependencies>c,file-tools</dependencies>
-	</target>
+    <target>
+        <option arg="with-docs">
+            <value str="all">
+                <dependencies>pandoc,doxygen</dependencies>
+                <make>
+                    # Documentation
+                    WITH_DOCS_API=yes
+                    WITH_DOCS_HTML=yes
+                </make>
+            </value>
+            <value str="html">
+                <dependencies>pandoc</dependencies>
+                <make>
+                    # Documentation
+                    WITH_DOCS_HTML=yes
+                </make>
+            </value>
+            <value str="api">
+                <dependencies>doxygen</dependencies>
+                <make>
+                    # Documentation
+                    WITH_DOCS_API=yes
+                </make>
+            </value>
+            <value str="none"/>
+            <default value="all"/>
+            <default value="html"/>
+            <default value="api"/>
+            <default value="none"/>
+        </option>
+        <feature name="coverage">
+            <dependencies>coverage</dependencies>
+        </feature>
+        <dependencies>c,file-tools</dependencies>
+    </target>
 </project>
-