Small typo

for_tests/Dockerfile

@@ -60,12 +60,14 @@ RUN make clean &&\
     make &&\
     make install
 
+
 # Install FastTree
 WORKDIR /tmp
 RUN wget http://www.microbesonline.org/fasttree/FastTree.c &&\
     gcc -DOPENMP -fopenmp -DUSE_DOUBLE -Wall -O3 -finline-functions -funroll-loops -o FastTreeMP FastTree.c -lm &&\
     ln -s /tmp/FastTreeMP /usr/local/bin
 
+
 # Install FastME
 WORKDIR /tmp
 RUN apt-get install -y automake  &&\
@@ -75,6 +77,7 @@ RUN ./configure &&\
     make &&\
     make install
 
+
 # Install quicktree
 WORKDIR /tmp
 RUN git clone https://github.com/tseemann/quicktree