Cleaning up .def file script and useless comments

picard_3.0.0.def

@@ -3,7 +3,7 @@ From: centos:8
 
 %help
 This is a singularity container packing picard tools v3.0.0 and java 17. An R installation (4.3.3) is also provided as it is required by some picard tools. 
-Author : yannis.duffourd@u-bourgogne.fr, valentin.vautrot@u-bourgogne.fr
+Authors : yannis.duffourd@u-bourgogne.fr, valentin.vautrot@u-bourgogne.fr
 
 This singularity recipe is open source and free. Please redistribute it as well.
 No warranty is provided.
@@ -16,10 +16,6 @@ dnf update -y --exclude=filesystem
 dnf install -y epel-release wget
 dnf --enablerepo=powertools install -y openblas-devel
 
-# # install R with (old) java included
-# dnf install -y R-4.3.3-1.el8.x86_64
-# dnf remove -y java-1.8.0-openjdk java-1.8.0-openjdk-devel java-1.8.0-openjdk-headless
-
 # # install R
 dnf install -y R-core-4.3.3-1.el8.x86_64
 
@@ -45,7 +41,7 @@ Java version 17.0.1
     export PATH=$PATH:$JAVA_HOME/bin
 
 %runscript
-echo "java version : "
+echo "## java version : "
 java -version
-echo "R version : "
+echo "## R version : "
 R --version
\ No newline at end of file